.study-hero { background: var(--deep); color: white; padding: 3rem 0 4rem; }
.breadcrumb { font-size: .85rem; color: #b6c7df; margin-bottom: 2.2rem; }
.breadcrumb a { color: white; }
.study-hero .eyebrow { color: var(--cyan); }
.study-hero h1 { font-size: clamp(2.5rem, 5vw, 4.3rem); max-width: 910px; }
.study-intro { font-size: 1.15rem; color: #c4d1e3; max-width: 740px; margin-top: 1.6rem; }
.author-row { display: flex; align-items: center; gap: 1rem; flex-wrap: wrap; margin-top: 2rem; font-size: .95rem; }
.author-row span { color: #b6c7df; font-size: .85rem; }
.author-row .copy-email { color: var(--cyan); }
.section-nav { background: white; border-bottom: 1px solid var(--line); }
.section-nav .container { display: flex; gap: 2rem; flex-wrap: wrap; padding-block: 1.1rem; }
.section-nav a { text-decoration: none; color: var(--muted); font-size: .9rem; font-weight: 600; }
.section-nav a:hover { color: var(--blue); }
.study-context { display: grid; grid-template-columns: .8fr 1.2fr; gap: 5rem; }
.question-card { background: var(--soft-blue); border-radius: var(--radius); padding: 2rem; }
.question-card h2 { font-size: 1.55rem; line-height: 1.4; }
.question-card .eyebrow { margin-bottom: .8rem; }
.study-context h3 { margin-bottom: 1rem; }
.method-section { background: white; }
.method-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 1.5rem; margin-bottom: 3rem; }
.method-step { border-top: 2px solid var(--line); padding-top: 1.3rem; }
.method-step > span { font: .8rem var(--mono); color: var(--blue); }
.method-step h3 { font-size: 1.15rem; margin-top: .8rem; letter-spacing: -.025em; }
.method-step p { color: var(--muted); margin-top: .8rem; font-size: .93rem; }
.diagram-panel { margin: 0; padding: 1.6rem; border: 1px solid var(--line); background: var(--paper); border-radius: var(--radius); }
.diagram-panel img { width: min(100%, 900px); margin-inline: auto; background: white; border-radius: .6rem; }
.diagram-panel figcaption { margin-top: 1.3rem; display: flex; justify-content: space-between; gap: 2rem; align-items: start; color: var(--muted); font-size: .9rem; }
.diagram-panel figcaption p { max-width: 680px; }
.diagram-panel figcaption a { white-space: nowrap; }
.source-note { margin-top: 1.4rem; font-size: .85rem; color: var(--muted); }
.evaluation-takeaway { margin-top: 2rem; }
.limitations-grid { display: grid; grid-template-columns: .7fr 1.3fr; gap: 4rem; }
.limitations-list { margin: 0; padding-left: 1.2rem; color: var(--muted); }
.limitations-list li + li { margin-top: 1.3rem; }
.context-details { margin-top: 2rem; border: 1px solid var(--line); border-radius: .7rem; padding: 1rem 1.2rem; }
.context-details summary { cursor: pointer; font-weight: 650; font-size: .94rem; }
.context-details p { margin-top: 1rem; color: var(--muted); font-size: .93rem; }
.documents-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.next-contribution { border-top: 1px solid var(--line); margin-top: 3rem; padding-top: 2rem; display: flex; justify-content: space-between; gap: 1rem; }
.next-contribution span { color: var(--muted); }
.study-metrics { display: grid; grid-template-columns: repeat(4,1fr); gap: 1rem; }
.study-metric { padding: 1.7rem; border-radius: 1rem; background: white; border: 1px solid var(--line); }
.study-metric h3 { font-size: .85rem; line-height: 1.5; min-height: 3em; margin-bottom: 1.3rem; letter-spacing: 0; color: var(--muted); }
.study-metric .metric { font-size: 2.65rem; }
.study-metric p { font-size: .85rem; color: var(--muted); margin-top: 1rem; }
.study-sample { display: flex; flex-wrap: wrap; gap: .6rem; margin-bottom: 1.5rem; }
@media (max-width: 950px) { .study-context { gap: 2rem; } .method-grid, .study-metrics { grid-template-columns: 1fr 1fr; } }
@media (max-width: 700px) { .study-context, .limitations-grid, .documents-grid { grid-template-columns: 1fr; gap: 2rem; } .section-nav .container { gap: 1.2rem; } .diagram-panel { padding: .9rem; } .diagram-panel figcaption { flex-direction: column; gap: .6rem; } .next-contribution { flex-direction: column; } .method-grid { gap: 1.1rem; } .study-metric { padding: 1.2rem; } }
@media (max-width: 420px) { .method-grid, .study-metrics { grid-template-columns: 1fr; } }